>>> delicate work is now underway in the west bank to review the body of yasser arafat. french authorities have launched a murder investigation into his death after finding a radio active substance on some of his personal things. cnn's senior international correspondent sara sidner is in ramallah. >> reporter: security forces are keeping us as far away as possible from the palestinian presidential compound, where the body of deceased peo leader yasser arafat has been laid to rest. now, you can see below and behind me, a huge blue tarpaulin that is surrounding his mausoleum. what we're hearing from a source is the glass that usually surrounds that mausoleum has now been taken down and workers are working on removing the marble tombstone. this is all happening because the family of yasser arafat believes he was murdered after plunium 210 was found on his body, according to a swiss lab. his body is supposed to be exhumed this month and there is a lot of work to be done. a source says the exhumation could take at least two weeks and maybe more because some of the work will b